Cavity for testing current-carrying capacity of conductor

Abstract

The utility model relates to a cavity for testing the current-carrying capacity of a conductor, which comprises a shell and a clamp, a cavity is arranged in the shell, one end of the cavity is opened, and a cylinder cover is buckled at the opening; a vacuum gauge connecting port, a vacuum pump connecting port, a circuit connecting port and a protective gas connecting port are respectively formed in the side wall of the shell; the clamp comprises a supporting seat and a carrier, the supporting seat is fixed in the cavity of the shell, the carrier is fixed on the supporting seat, the carrier is used for clamping a sample to be tested, and the carrier is connected with external circuit equipment to form a test loop; during testing, the cavity can be vacuumized, or protective gases such as nitrogen and argon are filled into the cavity, so that a sample is tested in vacuum or protective gases, the influence of water vapor and oxygen on testing is eliminated, and the testing accuracy is improved.

Description

Technical Field

[0001] This utility model belongs to the field of conductor testing technology, and specifically relates to a cavity for testing conductor current carrying capacity. Background Technology

[0002] The purpose of conductor current-carrying capacity testing is to determine the maximum current a conductor can carry under specific conditions, which requires specialized testing equipment and methods. During the test, the load current is gradually increased and relevant data is recorded to evaluate the conductor's long-term current-carrying capacity and stability.

[0003] Currently, conductor current carrying capacity tests are all conducted indoors. However, because the air contains moisture and oxygen, the samples may oxidize during testing, resulting in a decrease in conductor current carrying capacity and thus affecting the accuracy of the measurement.

[0004] Therefore, there is an urgent need to develop a testing chamber that can eliminate the influence of water vapor and oxygen on the test. Utility Model Content

[0005] To address at least one of the problems in the prior art, the purpose of this utility model is to provide a cavity for testing conductor current carrying capacity, which can be evacuated or filled with protective gases such as nitrogen or argon, so that the sample can be tested in a vacuum or protective gas, thereby eliminating the influence of water vapor and oxygen on the test.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cavity for testing the current carrying capacity of a conductor, comprising:

[0008] The housing has an internal cavity and an opening at one end, with a cylindrical cover attached to the opening; the side walls of the housing are respectively provided with a vacuum gauge connection port, a vacuum pump connection port, an electrical circuit connection port, and a protective gas connection port.

[0009] The fixture includes a support base and a carrier. The support base is fixed inside the cavity of the housing, and the carrier is fixed on the support base. The carrier is used to hold the sample to be tested, and the carrier is connected to external circuit equipment to form a test circuit.

[0010] Preferably, the bottom of the other end of the housing is an outwardly convex arc shape.

[0011] Preferably, the side wall of the housing is provided with an observation window.

[0012] Preferably, the protective gas connection port is connected to a three-port connector.

[0013] Preferably, the support base includes a partition and an insulating plate, the partition and the insulating plate are connected by a support column, and the partition is fixed inside the cavity of the housing.

[0014] Preferably, the carrier includes two sets of connecting posts and clamping blocks, each set of clamping blocks is disposed at the top of the corresponding connecting post, and the sample is clamped between the two sets of clamping blocks; the two sets of connecting posts are respectively disposed at both ends of the surface of the insulating plate.

[0015] Preferably, each group of connecting posts consists of two posts.

[0016] Preferably, the insulating plate has two parallel grooves, and all the connecting posts are slidably disposed on the grooves.

[0017] Preferably, each set of clamping blocks includes an upper clamping block and a lower clamping block, with one end of the sample clamped between the upper clamping block and the lower clamping block.

[0018] Preferably, the upper clamping block and the lower clamping block are connected by screws, and one of the screws on each set of clamping blocks is used to connect to an electrode of an external circuit device.

[0019] This utility model has the following advantages due to the adoption of the above technical solution:

[0020] 1. The conductor current carrying capacity testing chamber provided by this utility model eliminates the influence of water vapor and oxygen on the test by evacuating the chamber or filling it with protective gases such as nitrogen and argon, thereby improving the accuracy of the test.

[0021] 2. The conductor current carrying capacity testing cavity provided by this utility model allows the fixture to measure samples of different lengths by adjusting the distance between the relative connecting columns. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a conductor current carrying capacity testing cavity provided in an embodiment of the present invention.

[0023] Figure 2 This is a front-view cross-sectional view of the conductor current carrying capacity testing cavity provided in this embodiment of the present invention.

[0024] Figure 3 This is a three-dimensional schematic diagram of the clamp provided in this embodiment of the present invention.

[0025] Marked in the attached diagram:

[0026] 1 is the shell, 101 is the cylinder cover, 102 is the vacuum gauge connection port, 103 is the vacuum pump connection port, 104 is the circuit connection port, 105 is the protective gas connection port, 106 is the observation window, 2 is the clamp, 201 is the partition, 202 is the insulating plate, 203 is the support column, 204 is the connecting column, 205 is the upper clamping block, 206 is the lower clamping block, 207 is the slide groove, and 3 is the base. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "assembly," "setup," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] This invention provides a chamber for testing the current carrying capacity of conductors. The chamber can be evacuated or filled with protective gases such as nitrogen or argon, so that the sample can be tested in a vacuum or protective gas environment. This eliminates the influence of water vapor and oxygen on the test and improves the accuracy of the test.

[0031] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] Example

[0033] Please refer to the reference. Figures 1 to 3 This embodiment provides a cavity for testing the current carrying capacity of a conductor, comprising a housing 1 and a clamp 2:

[0034] The housing 1 has a cavity inside, and one end of it is open. A cylindrical cover 101 is fastened to the opening. The side wall of the housing 1 is provided with a vacuum gauge connection port 102, a vacuum pump connection port 103, an electrical circuit connection port 104 and a protective gas connection port 105.

[0035] The fixture 2 includes a support base and a carrier. The support base is fixed inside the cavity of the housing 1, and the carrier is fixed on the support base. The carrier is used to hold the sample to be tested, and the carrier is connected to external circuit equipment to form a test circuit.

[0036] In practical applications, the housing 1 is a hollow cylinder, which can be made of metal and has good strength. The cap 101 is fastened to the opening of the housing 1, and a sealing ring is provided on the cap. The opening and cap 101 are sealed together, and the cap 101 can be locked to the housing 1 using clamps. The cap 101 is removable, allowing for easy removal of the test sample through the opening. The bottom of the other end of the housing 1 is an outwardly convex arc shape, which can be hemispherical.

[0037] The side wall of the housing 1 is provided with a vacuum gauge connection port 102 for connecting a vacuum gauge to measure the vacuum level inside the cavity.

[0038] The vacuum pump connection port 103 is connected to the vacuum pump through a bellows. The vacuum pump extracts the air from the cavity, making the cavity close to a vacuum.

[0039] The circuit connection port 104 is used to connect the internal and external circuits of the cavity. Two electrode connection posts can be connected at the circuit connection port 104. The inner ends of the two electrode connection posts are connected to the two ends of the carrier respectively through cables. The outer ends of the two electrode connection posts are connected to the two electrodes of the external circuit device, so that the sample and the external circuit form a test circuit. The external circuit device is a programmable DC power supply that can provide DC power.

[0040] The protective gas connection port 105 is connected to a protective gas filling device, which can be a gas cylinder. The protective gas can be nitrogen or argon. The protective gas connection port 105 is connected to a three-port connector. The other two ports of the three-port connector are the protective gas inlet and the vent, respectively. A valve can be installed on the vent.

[0041] In this embodiment, the side wall of the housing 1 is provided with an observation window 106, which is a circular glass window. During the experiment, the sample condition can be observed at any time through the observation window 106.

[0042] Please refer to the reference. Figure 3 In this embodiment, the support base includes a partition 201 and an insulating plate 202, which are connected by a support column 203. The partition 201 is fixed in the cavity of the housing.

[0043] Specifically, both the partition 201 and the insulating plate 202 are rectangular plates, and there are four support columns 203, which are distributed at the four corners of the partition 201 and the insulating plate 202.

[0044] In this embodiment, the carrier includes two sets of connecting posts 204 and clamping blocks. Each set of clamping blocks is disposed at the top of the corresponding connecting post 204, and the sample is clamped between the two sets of clamping blocks. The two sets of connecting posts 204 are respectively disposed at both ends of the surface of the insulating plate 202.

[0045] Specifically, each set of connecting posts 204 consists of two posts, each with a threaded hole at its bottom. The insulating plate 202 has two parallel grooves 207, on which all connecting posts 204 are slidably mounted and secured with bolts. Each groove 207 contains two connecting posts 204, and by adjusting the distance between the opposing connecting posts 204, samples of different lengths can be measured.

[0046] In this embodiment, each set of clamping blocks includes an upper clamping block 205 and a lower clamping block 206, with one end of the sample clamped between the upper clamping block 205 and the lower clamping block 206.

[0047] Specifically, an upper clamping block 205 and a lower clamping block 206 are stacked on the two connecting posts 204 on each side. The upper clamping block 205 and the lower clamping block 206 are two copper blocks used to press down the sample. The upper clamping block 205 and the lower clamping block 206 are connected by screws to press the two upper clamping blocks 205 and the lower clamping block 206 together, which also clamps the sample. One of the screws on each set of clamping blocks is connected to an electrode of an external circuit device through a cable, so that the test sample and the external circuit device form a closed test circuit.

[0048] In this embodiment, a base 3 is welded to the side wall of the housing 1. The base 3 is a U-shaped plate, which enables the housing 1 to be placed stably on the ground.

[0049] In this embodiment, when using the conductor current carrying capacity testing chamber, the cover 101 is opened, the distance between the left and right clamping blocks is adjusted, and the sample is clamped by the upper clamping block 205 and the lower clamping block 206 and secured with screws. The sample can be copper foil, copper wire, or copper mesh. The cover 101 is closed, the valve on the vent is shut off, the vacuum pump is started, and the chamber is evacuated. The vacuum gauge is observed, and when the reading of the vacuum gauge reaches below 10 Pa, the vacuum requirement in the chamber is met, and the evacuation is stopped. The external circuit equipment is then started to pass current through the sample, and the current is gradually increased until the sample melts. The current at the time of melting is then read.

[0050] If testing under a protective gas atmosphere is required, when the vacuum gauge reading drops below 10 Pa, open the valve of the filling device to fill the chamber with protective gas, and then apply current for testing. After the test, open the valve on the vent to allow outside air to enter the chamber and restore atmospheric pressure inside.

[0051] In this embodiment, the conductor current carrying capacity testing chamber eliminates the influence of water vapor and oxygen on the test by first evacuating the sample current carrying capacity test, thereby improving the accuracy of the test.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cavity for testing the current carrying capacity of a conductor, characterized in that, include: The housing has an internal cavity and an opening at one end, with a cylindrical cover attached to the opening; the side walls of the housing are respectively provided with a vacuum gauge connection port, a vacuum pump connection port, an electrical circuit connection port, and a protective gas connection port. The fixture includes a support base and a carrier. The support base is fixed inside the cavity of the housing, and the carrier is fixed on the support base. The carrier is used to hold the sample to be tested, and the carrier is connected to external circuit equipment to form a test circuit.

2. The cavity for testing conductor current carrying capacity according to claim 1, characterized in that, The bottom of the other end of the shell is an outwardly convex arc shape.

3. The cavity for testing conductor current carrying capacity according to claim 1, characterized in that, The side wall of the housing is provided with an observation window.

4. The conductor current-carrying capacity testing cavity according to claim 1, characterized in that, The protective gas connection port is connected to a three-port connector.

5. The conductor current-carrying capacity testing cavity according to claim 1, characterized in that, The support base includes a partition and an insulating plate, which are connected by a support column. The partition is fixed inside the cavity of the housing.

6. The conductor current-carrying capacity testing cavity according to claim 5, characterized in that, The carrier includes two sets of connecting posts and clamping blocks. Each set of clamping blocks is disposed at the top of the corresponding connecting post, and the sample is clamped between the two sets of clamping blocks. The two sets of connecting posts are respectively disposed at both ends of the surface of the insulating plate.

7. The conductor current-carrying capacity testing cavity according to claim 6, characterized in that, Each group of connecting posts is configured with two posts.

8. The conductor current-carrying capacity testing cavity according to claim 7, characterized in that, The insulating plate has two parallel sliding grooves, and all the connecting posts are slidably mounted on the sliding grooves.

9. The conductor current-carrying capacity testing cavity according to claim 6, characterized in that, Each set of clamping blocks includes an upper clamping block and a lower clamping block, with one end of the sample clamped between the upper clamping block and the lower clamping block.

10. The conductor current-carrying capacity testing cavity according to claim 9, characterized in that, The upper clamping block and the lower clamping block are connected by screws, and one of the screws on each set of clamping blocks is used to connect to an electrode of an external circuit device.

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